US6954309B2 - Optical component - Google Patents

Optical component Download PDF

Info

Publication number
US6954309B2
US6954309B2 US10/332,372 US33237203A US6954309B2 US 6954309 B2 US6954309 B2 US 6954309B2 US 33237203 A US33237203 A US 33237203A US 6954309 B2 US6954309 B2 US 6954309B2
Authority
US
United States
Prior art keywords
refractive index
layer
optical component
electromagnetic radiation
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/332,372
Other languages
English (en)
Other versions
US20040075923A1 (en
Inventor
Pascal Knobloch
Dimitry Turchinovich
Thomas Dobbertin
Martin Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technische Universitaet Braunschweig
Original Assignee
Technische Universitaet Braunschweig
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technische Universitaet Braunschweig filed Critical Technische Universitaet Braunschweig
Assigned to TECHNISCHE UNIVERSITAT BRAUNSCHWEIG CAROLO-WILHELMINA reassignment TECHNISCHE UNIVERSITAT BRAUNSCHWEIG CAROLO-WILHELMINA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DOBBERTIN, THOMAS, KNOBLOCH, PASCAL, TURCHINOVICH, DMITRY, KOCH, MARTIN
Publication of US20040075923A1 publication Critical patent/US20040075923A1/en
Application granted granted Critical
Publication of US6954309B2 publication Critical patent/US6954309B2/en
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • G02B5/287—Interference filters comprising deposited thin solid films comprising at least one layer of organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective

Definitions

  • the invention relates to an optical component for applications in the gigahertz and terahertz frequency range.
  • band-pass filters of metal gratings are known which are produced with an appropriate grating constant in each case. Such a band-pass filter is described in “Applied Optics”, Volume 20, No. 8 of Apr. 15, 1981, page 1361.
  • the outside wall element for buildings with high reflection loss for radar beams is described.
  • the outside wall element consists of a multiplicity of segments in which the reflected surface is alternately staggered in depth in such a manner that in each case two adjacent surface segments are arranged spaced apart by a distance corresponding to a quarter wavelength of the radar radiation used.
  • the radar waves reflected by the adjacent surface segments differ by half a wavelength in phase from one another due to the staggering of the surface segments in depth so that the reflected waves cancel one another.
  • the absorption is not frequency selective.
  • DD 146 224 an arrangement for induced absorption of electromagnetic radiation is described in which a number of layers capable of interference composed of individual layers with alternately low refraction and high refraction are provided.
  • the arrangement based on a dielectric mirror is only suitable for absorption and not for frequency-selective reflection.
  • an optical component having at least one first layer of a first material, which is optically transparent for electromagnetic radiation of a reference frequency between 5 gigahertz and 10 terahertz, with a first refractive index, the first layer having an optical thickness of approximately one quarter of the wavelength of the electromagnetic radiation of the reference frequency in the first material.
  • the first layer is applied to a second layer, which is transparent to the electromagnetic radiation of the reference frequency, the second refractive index of which is different from the first refractive index.
  • the optical thickness of the second layer is about 1 ⁇ 4 or 1 ⁇ 2 of the wavelength of the reference frequency.
  • interference phenomena of the electromagnetic radiation in the gigahertz or terahertz frequency range due to different dielectric characteristics or different refractive indices of two optically transparent materials are thus utilized in order to effect a frequency-selective reflection, for example for shielding rooms.
  • This is of importance to the wireless in-door communication in the GHz and THz range.
  • the optical component is essentially transparent and, in general, a reflection effect also occurs at higher harmonics of the reference frequency.
  • the optical component makes use of the physical characteristics of the dielectric mirror. Using a dielectric mirror for the frequency-selective shielding of rooms has hitherto not been possible in the conventionally used frequencies within the microwave range since this would require multiple layers of considerable thickness.
  • optically transparent materials can advantageously be plastic materials such as polyethylene or polystyrene which can also be produced relatively inexpensively in large surface areas with very accurate and uniform layer thickness.
  • an optically transparent material having low absorption of the reference frequency selected in each case is selected so that the optical component according to the invention provides for as complete reflection or transmission of the radiation of the reference frequency as possible.
  • dielectric mirrors are produced in which layers of different dielectric constant or with different refractive index are arranged alternately above one another and in each case have an optical thickness of a quarter of the wavelength of the reference radiation.
  • the coating of optical components e.g. optical lenses, is known. Using such coating, it is possible to keep reflection at the interface between air and the optical component low by means of destructive interference of the waves reflected at the interface between the air and the coating layer and the interface between the coating layer and the component.
  • the invention is based on the finding that, for optical components using interference phenomena due to different dielectric properties of the materials used, layer thicknesses lying within the micrometer range up to the range of several 100 micrometers or the millimeter range must be constructed especially in the frequency range between 0.5 gigahertz, but preferably from 5 gigahertz, and 10 terahertz according to the invention.
  • Such layers can also be produced very accurately and very uniformly on a large scale.
  • plastic materials such as, e.g., polyethylene or polystyrene can be used, in particular, which can also be produced with very accurate thickness in this thickness range also for large areas.
  • different layers with different refractive index e.g.
  • plastic materials or plastic materials with different dopings of other components can be inexpensively joined to one another also for large areas.
  • the layer thicknesses in the micrometer and millimeter range according to the invention only require a small material expenditure even for large-area applications.
  • plastic materials of these thicknesses in particular, have good mechanical properties, especially high flexibility with respect to mechanical loading even with abrupt mechanical loads.
  • a dielectric mirror for reflecting required frequency ranges can be advantageously produced.
  • this can be done by a number of alternating layers having in each case an optical thickness of a quarter of the wavelength of the reference radiation, but also by means of other suitable layer sequences.
  • the dielectric mirror for radiation in the gigahertz and terahertz frequency range can be used, on the one hand, for optical components in devices which emit or receive radiation in this wavelength range.
  • the dielectric mirror according to the invention can be used over a large area for shielding room units, especially if it is made of thin plastic films.
  • This shielding can be achieved, for example, in that a multilayered optical component is used, e.g. for cladding rooms. This can be done on a wall, for example on wallpaper, or inside the wall, e.g. underneath the wallpaper, between cardboard walls or inside brickwork.
  • windows and glass panes can also be clad with an optical component according to the invention if the materials used are also transparent in the visible frequency range.
  • cellular areas can be formed by this means in a building, in which a reference radiation in the gigahertz or terahertz frequency range is in each case used for wireless data transmission between different units.
  • the cellular area is advantageously at least largely completely shielded from the outside world for this frequency range.
  • a number of cellular areas can be formed within a building or a building or a story in a building can be shielded as a whole from the outside world.
  • the shielding according to the invention has the advantage that other frequency ranges are not affected and thus a data transmission via the other frequency ranges, e.g. by means of mobile radio, radio, etc. remains unaffected.
  • Such applications are of interest, in particular, for high data transmissions since the gigahertz and terahertz frequency range used according to the invention provides for higher data transmission rates compared with known data transmissions in the megahertz frequency range.
  • large data volumes can also be transmitted rapidly for which parallel interfaces are conventionally used such as, e.g., a wireless data transmission from a computer to a printer.
  • the second optical component makes it possible to selectively reflect radiation incident on the wall at a shallow angle so that, overall, radiation can be reflected from any spatial direction.
  • FIG. 1 shows a section through an optical component for reflection applications according to a first embodiment of the invention
  • FIG. 2 shows a section through an optical component for reflection applications according to a second embodiment of the invention.
  • FIG. 1 shows a dielectric multilayer mirror in which first layers 1 , 3 , 5 of a first material m 1 with a first refractive index n 1 alternate with second layers 2 , 4 of a second material m 2 with a second refractive index n 2 .
  • this material can be a plastic, e.g. polyethylene or polystyrene.
  • n 1 is greater than n 2 .
  • the layers 1 to 5 in each case have an optical thickness of a quarter of the wavelength ⁇ of a reference radiation in the frequency range from 5 GHz to 10 THz. Suitable reference frequencies are located, in particular, within the range from 50 gigahertz to 2 terahertz.
  • the first layers 1 , 3 , 5 are thinner than the second, optically thinner layers 2 and 4 .
  • a frequency shift of half the wavelength is obtained with an incidence of the reference radiation at a first interface 10 between air and the first layer due to a reflection on an optically denser medium for the reflected radiation.
  • a reflection without phase shift is obtained at the interfaces 12 of the optically denser first layer and an optically thinner second layer.
  • a reflection with a phase shift of half the wavelength is again obtained.
  • the last layer 5 can be advantageously a first layer of the optically thicker medium.
  • FIG. 2 shows a further embodiment of a dielectric mirror in which an optically dense first layer 1 of a first material m 1 with a first refractive index n 1 is followed by an optically thinner second layer 8 of a second material m 2 with a second refractive index n 2 . Underneath the second layer 8 , a sub area 9 of a third material with an optically thinner material m 3 is formed. n 1 is thus greater than n 2 which is greater than n 3 .
  • the first layer 1 again has a thickness of a quarter of the wavelength of a reference radiation
  • the second layer 8 has a thickness of half the wavelength of the reference radiation. This can be followed by a sub area 9 of arbitrary size.
  • the reference radiation is reflected away so that only other frequency ranges can enter into the optically transparent base 9 .
  • a reflection takes place at an optically thinner medium at the interface 14 , in addition to the reflections at the interfaces 10 and 12 which correspond to those of FIG. 1 , as a result of which a wave is reflected back with a phase shift of half the wavelength.
  • this wave reflected back experiences a phase shift of ⁇ compared with the wave reflected on the interface 12 so that the waves reflected at the interfaces 12 and 14 and the waves reflected on the interface 10 are constructively superimposed.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Aerials With Secondary Devices (AREA)
  • Laminated Bodies (AREA)
  • Glass Compositions (AREA)
  • Surface Treatment Of Optical Elements (AREA)
US10/332,372 2000-07-10 2001-07-10 Optical component Expired - Fee Related US6954309B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10033259A DE10033259C2 (de) 2000-07-10 2000-07-10 Optisches Bauelement
DE10033259.5 2000-07-10
PCT/DE2001/002492 WO2002005291A2 (de) 2000-07-10 2001-07-10 Optisches bauelement

Publications (2)

Publication Number Publication Date
US20040075923A1 US20040075923A1 (en) 2004-04-22
US6954309B2 true US6954309B2 (en) 2005-10-11

Family

ID=7648260

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/332,372 Expired - Fee Related US6954309B2 (en) 2000-07-10 2001-07-10 Optical component

Country Status (7)

Country Link
US (1) US6954309B2 (de)
EP (1) EP1299886B1 (de)
JP (1) JP2004502978A (de)
AT (1) ATE319165T1 (de)
AU (1) AU2001276310A1 (de)
DE (2) DE10033259C2 (de)
WO (1) WO2002005291A2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212004A1 (en) * 2004-03-24 2005-09-29 Silicon Light Machines Corporation Spatial light modulator with robust mirror substrate condition
WO2011015200A1 (en) 2009-08-05 2011-02-10 Danmarks Tekniske Universitet Encoding an optical signal using a wireless radio-frequency signal
US20110205528A1 (en) * 2008-10-14 2011-08-25 Tohoku University Sample analysis method
WO2015073049A1 (en) * 2013-11-13 2015-05-21 Arc Technologies, Inc. Multi-layer absorber
US9832918B2 (en) 2015-08-13 2017-11-28 Arc Technologies, Inc. EMR absorbing server vent

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2004059784A1 (ja) 2002-12-26 2006-05-11 松下電器産業株式会社 誘電体フィルタ
WO2006088155A1 (ja) * 2005-02-18 2006-08-24 Murata Manufacturing Co., Ltd. 誘電体多層周期構造体
EP1967872A4 (de) * 2005-12-28 2009-08-05 Murata Manufacturing Co Optisches filter für das terahertzband, entwurfsverfarhen dafür und herstellungsverfahren dafür
JP4849695B2 (ja) * 2006-12-19 2012-01-11 株式会社村田製作所 テラヘルツ帯用光学部品
DE102007021954A1 (de) * 2007-05-10 2008-11-13 Neue Materialien Würzburg GmbH Vorrichtung zum Reflektieren elektromagnetischer Strahlung
US11362431B1 (en) * 2015-06-16 2022-06-14 Oceanit Laboratories, Inc. Optically transparent radar absorbing material (RAM)
CN107544103B (zh) * 2016-06-28 2020-08-18 中国计量大学 基于石墨烯的双频带太赫兹吸波器
CN106630979B (zh) * 2016-09-21 2019-10-29 中国人民解放军国防科学技术大学 一种耐高温频率选择透波结构及其制备方法
TWI719840B (zh) * 2019-11-15 2021-02-21 符仙瓊 應用於建築部件以增加射頻訊號穿透率之介電體結構及其設置方法
DE102021111253A1 (de) 2021-04-30 2022-11-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Linsenantenne mit integrierter Interferenzfilterstruktur
CN114664552B (zh) * 2022-03-01 2023-05-16 电子科技大学 基于SmCo5永磁薄膜获得显著太赫兹磁导率的方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE146224C (de)
US3551017A (en) * 1967-05-19 1970-12-29 Hitachi Ltd Far infrared transmission type interference filter
US4854670A (en) 1986-12-17 1989-08-08 Gte Products Corporation Wide angle optical filters
DE3913421A1 (de) 1989-04-24 1990-10-25 Ver Glaswerke Gmbh Aussenwandelement eines gebaeudes mit hoher reflexionsdaempfung fuer radarstrahlen
DE3918383A1 (de) 1989-06-06 1990-12-20 Messerschmitt Boelkow Blohm Fassadenaufbau von hochbauten
SU1675816A1 (ru) 1989-12-13 1991-09-07 Харьковский государственный университет им.А.М.Горького Оптический вентиль
US5119232A (en) * 1990-12-17 1992-06-02 Hughes Aircraft Company Infrared-transmissive optical window
WO1994002972A1 (en) 1992-07-16 1994-02-03 Calling Communications Corporation Spacecraft intersatellite link for satellite communication system
US5776612A (en) * 1996-02-21 1998-07-07 Exotic Materials Inc. Window that transmits light energy and selectively absorbs microwave energy
RU2187414C1 (ru) 2001-06-13 2002-08-20 Тульский государственный университет Устройство автоматического управления положением сварочной головки

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD146224A1 (de) * 1979-04-27 1981-01-28 Hubert Pohlack Anordnung zur induzierten absorption elektromagnetischer strahlung
SU1682950A1 (ru) * 1985-04-09 1991-10-07 Сибирский физико-технический институт им.В.Д.Кузнецова при Томском государственном университете им.В.В.Куйбышева Отражающий интерференционный светофильтр
JPH0781334B2 (ja) * 1987-01-13 1995-08-30 六郎 間久部 電波利用設備を収容するための建造物
JPS6480906A (en) * 1987-09-22 1989-03-27 Mitsubishi Electric Corp Infrared-light and radio wave separating plate
JP2754214B2 (ja) * 1988-07-12 1998-05-20 工業技術院長 光パルスの周波数チャープ補償が出来る誘電体多層膜
JPH11195890A (ja) * 1998-01-05 1999-07-21 Nippon Paint Co Ltd 特定範囲の周波数の電磁波を反射する新規な導電性双極性素子パターン及びこれを有する周波数選択性電磁波シールド材
JP3180899B2 (ja) * 1998-03-09 2001-06-25 鹿島建設株式会社 電波遮蔽面状体及び建物内電波遮蔽域
CA2324267A1 (en) * 1998-03-16 1999-09-23 Chiping Chen Polymer-inorganic multilayer dielectric film

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE146224C (de)
US3551017A (en) * 1967-05-19 1970-12-29 Hitachi Ltd Far infrared transmission type interference filter
US4854670A (en) 1986-12-17 1989-08-08 Gte Products Corporation Wide angle optical filters
DE3913421A1 (de) 1989-04-24 1990-10-25 Ver Glaswerke Gmbh Aussenwandelement eines gebaeudes mit hoher reflexionsdaempfung fuer radarstrahlen
DE3918383A1 (de) 1989-06-06 1990-12-20 Messerschmitt Boelkow Blohm Fassadenaufbau von hochbauten
SU1675816A1 (ru) 1989-12-13 1991-09-07 Харьковский государственный университет им.А.М.Горького Оптический вентиль
US5119232A (en) * 1990-12-17 1992-06-02 Hughes Aircraft Company Infrared-transmissive optical window
WO1994002972A1 (en) 1992-07-16 1994-02-03 Calling Communications Corporation Spacecraft intersatellite link for satellite communication system
US5776612A (en) * 1996-02-21 1998-07-07 Exotic Materials Inc. Window that transmits light energy and selectively absorbs microwave energy
RU2187414C1 (ru) 2001-06-13 2002-08-20 Тульский государственный университет Устройство автоматического управления положением сварочной головки

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
V. Tomaselli et al., "Far-Infrared Bandpass Filters From Cross-Shaped Grids," Applied Optics, Apr. 1981, vol. 20 No. 8; pp. 1361-1366.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050212004A1 (en) * 2004-03-24 2005-09-29 Silicon Light Machines Corporation Spatial light modulator with robust mirror substrate condition
US7085059B2 (en) * 2004-03-24 2006-08-01 Silicon Light Machines Corporation Spatial light modulator with robust mirror substrate condition
US20110205528A1 (en) * 2008-10-14 2011-08-25 Tohoku University Sample analysis method
US8514403B2 (en) * 2008-10-14 2013-08-20 Tohoku University Sample analysis method
WO2011015200A1 (en) 2009-08-05 2011-02-10 Danmarks Tekniske Universitet Encoding an optical signal using a wireless radio-frequency signal
WO2015073049A1 (en) * 2013-11-13 2015-05-21 Arc Technologies, Inc. Multi-layer absorber
US9541678B2 (en) 2013-11-13 2017-01-10 Arc Technologies, Inc. Multi-layer absorber
US10461437B2 (en) 2013-11-13 2019-10-29 Arc Technologies Llc Multi-layer absorber
US9832918B2 (en) 2015-08-13 2017-11-28 Arc Technologies, Inc. EMR absorbing server vent

Also Published As

Publication number Publication date
US20040075923A1 (en) 2004-04-22
DE10033259A1 (de) 2002-02-14
EP1299886A2 (de) 2003-04-09
ATE319165T1 (de) 2006-03-15
EP1299886B1 (de) 2006-03-01
DE50109082D1 (de) 2006-04-27
DE10033259C2 (de) 2003-06-26
AU2001276310A1 (en) 2002-01-21
JP2004502978A (ja) 2004-01-29
WO2002005291A2 (de) 2002-01-17
WO2002005291A3 (de) 2002-06-27

Similar Documents

Publication Publication Date Title
US6954309B2 (en) Optical component
Takeda et al. Localization of electromagnetic waves in three-dimensional fractal cavities
US7532397B2 (en) Optical material, optical device fabricated therefrom, and method for fabricating the same
US10073191B2 (en) Methods and apparatus for broadband angular selectivity of electromagnetic waves
Timusk et al. Near millimeter wave bandpass filters
US5559825A (en) Photonic band edge optical diode
US5208599A (en) Serrated electromagnetic absorber
KR102211661B1 (ko) 방향-선택적 간섭계형 광필터
Dewani et al. Optically transparent frequency selective surfaces on flexible thin plastic substrates
KR20180065788A (ko) 패브리-페로 광각 공진기
CA2288416A1 (en) Cut-off filters
EP2738875B1 (de) Cassegrain-mikrowellenantenne
AU6253100A (en) Dispersive multi-layer mirror
KR102661547B1 (ko) 투과형 다중분광 스텔스 소자
Good et al. Design of graded index flat lenses with integrated antireflective properties
JP2013115741A (ja) ミリ波帯用電波ハーフミラーおよびその透過率平坦化方法
Khan et al. Design and Etching of Bandpass FSS in Hard-Coated Energy-Saving Glass to Improve Transmission of Useful RF/MW Signals: J. Khan et al.
Bushbeck et al. A tuneable, switchable dielectric grating
US11362431B1 (en) Optically transparent radar absorbing material (RAM)
KR102760531B1 (ko) 적어도 2 개의 결합된 파브리-페로 구조를 포함하는 스펙트럼 필터
CN119029558B (zh) 一种雷达rcs缩减和红外发射率可调兼容的隐身超表面
CN119620265B (zh) 一种全介质的光学微波分光分频元件
Song et al. Design of transmittarray feed by filtering dielectric antenna for 5G
Parriaux et al. Lossless 0th and− 1st order switching by dual-excitation of grating waveguide mode
CN121679787A (zh) 太赫兹电介质光栅偏振器及其设计方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: TECHNISCHE UNIVERSITAT BRAUNSCHWEIG CAROLO-WILHELM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KNOBLOCH, PASCAL;TURCHINOVICH, DMITRY;DOBBERTIN, THOMAS;AND OTHERS;REEL/FRAME:014525/0876;SIGNING DATES FROM 20030818 TO 20030903

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20131011